Shift Solenoid Valves "A" & "B"
WARNING: This page is about a different car, the 2002 Infiniti QX4, 2001 Nissan Pathfinder, and 2001 Infiniti QX4. However, it is still accessible from the selected car via links, so may be relevant.
The TCM activates shift solenoid valves according to signals from TP sensor and revolution sensor. Optimum gear position is selected following memorized shift schedule. When solenoid valve is commanded on, drain circuit closes and pilot pressure is applied to shift valve. See Fig 1. For shift solenoid valve operation, see SHIFT SOLENOID VALVE OPERATION table.
SHIFT SOLENOID VALVE OPERATION (1)
| Gearshift Lever Position | Shift Solenoid Valve "A" | Shift Solenoid Valve "B" | |||
|---|---|---|---|---|---|
| "P" Or "N" | On | On | |||
| "O/D" | |||||
| 1st Gear | On | On | |||
| 2nd Gear | Off | On | |||
| 3rd Gear | Off | Off | |||
| 4th Gear | On | Off | |||
| "D" (Drive) | |||||
| 1st Gear | On | On | |||
| 2nd Gear | Off | On | |||
| 3rd Gear | Off | Off | |||
| "2" (Second) | |||||
| 1st Gear | On | On | |||
| 2nd Gear | Off | On | |||
| "L" (Low) | On | On | |||
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